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2 years ago

Solve the equation. d-7 = -18

Mathematics

2 answers:

Lana71 [14]2 years ago

5 0

Answer:

A) d = -11

Step-by-step explanation:

d - 7 = -18 (add 7 on both sides)

+7 +7

d = -11

Hope this helps!!!

Andrew [12]2 years ago

3 0

Answer:

d=-11

Step-by-step explanation:

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2 years ago

If (a,b) is an ordered pair for x-y=5, is (b,a) also a solution?

alina1380 [7]

The answer is no. Because solution (a,b) means x=a, y=b.and we have a-b=5. And (b,a) would mean x=b and y=a but then x-y=b-a=-(a-b)=-5≠5. So the pair (b,a) is not a solution.

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3 years ago

AB and CD are parallel find the value of y<br> Show clearly how you got your answers with reasons

Zina [86]

Answer:

y = 167°

Step-by-step explanation:

The vertex of the triangle = 154° ( alternate angle to 154° )

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2 years ago

Find the sum of 2y²+3yz-y²-yz-z²+6zy-3y² please help STEP explanation

larisa86 [58]

Answer:

See picture attached

Step-by-step explanation:

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2 years ago

Read 2 more answers

Solve each system of equations by writing a new system that eliminates one of the variables.

Rufina [12.5K]

Answer:

$x=33\\y=-41$

Step-by-step explanation:

Let:

$2x+y=25\hspace{5}(1)\\and\\4x+3y=9\hspace{5}(2)$

We need to eliminate one of the variables, so let's use elimination method. First multiply (1) by 2

$2*(1)\equiv\hspace{5}4x+2y=50$

Now subtract (2) from 2*(1) in order to eliminate x:

$2*(1)-(2)\\4x-4x+2y-3y=50-9\\-y=41$

Solving for y:

Multiplying both sides by -1

$y=-41$

Finally, replacing the value of y in (1)

$2x-41=25$

Solving for x:

add 41 to both sides:

$2x=66$

Multiply both sides by 1/2:

$x=\frac{66}{2} =33$

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3 years ago